How many blankets reached the Cedar tree ? ...
Interesting question. Mihail Petrovich Sharavin, one of the rescuers who was early on the scene and there for the discovery of the Yuris under the cedar tree, insists that there was a blanket covering the two Yuris.(Quotes below are from the interview on this site: "Transcript of the conversation with the representative of the "CENTER for Civil Investigation of the Dyatlov Tragedy" Elder (AK) and the representative of the "Dyatlov Foundation" Y. Kuntsevich (YK) with rescuer M. Sharavin (MSh)"
"This is why Yuri had the idea that while we found the tent and the first bodies of the 27th, someone visited the site besides us. For example, the brown blanket that was covering the bodies was no longer there. We claim that they were covered with a brown blanket, and then it disappeared, it turned out to be in the tent. It was at cedar and then ended up in a tent. And when they began to sort things out in the tent and found it there. Who moved it there?"
"In one book it says that we didn’t find the cedar, but allegedly Brusnitsyn with someone, this can't be true, because it is not something that you forget, we were the first to go together, there was nobody else there, with Yuri Koptelov. We walked side by side, went down together and literally 10 meters, or 15, before reaching the cedar, we saw something black, because the blanket was on top, it was not covered, it stood out. We approach and immediately... then we began to observe. We see traces of the fire, and the fire was on the same side [of the cedar] from which the guys were lying, and some branches were broken, we could see this."
MSh: They were within 2.5 m from the cedar, on the same side where the fire was near the cedar. They lay.
Navig: From the side of the tent?
MSh: No, on the opposite side, in the direction of the place where they found the rest in the ravine. And the fire was behind the cedar if you look from the side of the tent. And this is due to the fact that the wind then blew from the side of the tent and cedar protected from wind.
Navig: And who could cover them with a blanket?
MSh: Now, if we stick to our version, then we believed that Kolevatov, who was still alive, covered them, but Yuri believes that there may be groups that worked there to clean up, if we concider this version and maybe they were covered after they died. Although there are many perplexing questions because there are injuries incompatible with life just for the guys below.
Navig: А вот про ледоруб, это все-таки был их ледоруб или нет?
MSh: The ice ax was definitely theirs.
Navig: In the tent, quilted jackets were under the blankets or on top?
MSh: The quilted jackets were under the covers, first the skis lay below, then the backpacks, then the quilted jackets, then the blankets.
Navig: Were the blankets spread out or crumpled?
MSh: No, they were spread out. When we initially made our way in, we removed the snow, of course we did not completely clear it."
"At the floor [of the tent] everything was laid so carefully, nothing was turned upside down, they were just preparing for an overnight stay, nothing was amiss. Skis, quilted jackets lay down there ... backpacks, then quilted jackets ... blankets were spread like this ... So, what did we find? We didn’t even make out this far corner, it was so caved in... we looked at this part. Flashlight? Well, Slobtsov says that we found a flashlight there on the top ... Most likely, this was the case, but somehow I did not remember this. ... All that I say is reliable."
Not sure what to make of all this, myself, but it seemed at least partially relevant to your thoughts.